Method and apparatus for coking tars and hydrocarbon oil residues



2 Sheets-Sheet 1 G. CASH Filed May l2, 1928 METHOD AND APPARATUS FOR COKING TABS AND HYDROCARBON OIL RESIDUES i 1I il j mmuw A w Z 4 Feb. 16, 1932.

Feb. 16, 1932. G. CASH 1,844,944

METHOD AND APPARATUS FOR COKING TARS AND HYDROCARBON OIL RESIDUES Filed May l2, 1928 2 Sheets-Sheet 2 Patented Feb. 16, 1932 UNITEo STATES PATENT oFFIcE GENTRY CASH, OF WRITING, INDIANA, ASSIGNOB T0 STANDARD OIL COHIANY, 0F

WHITIN G, INDIANA, A COBPORATION OF INDIANA METHOD AND APPARATUS FOB. COKIN@ TABS AND HYDBOCARBON OII'JI. BESIDUES Application illed lay 12, 1928. Serial No. 277,384.

This invention relates to the coking of tars and particularly hydrocarbon oil residues.

The invention will readily be understood from the following description in conjunction with the accompanying drawings,m which:

Figure 1 is a sectional elevation of asuitble apparatus for coking such tars and resi- 2 is a partial section on' the line 2 of Fi l; and

Fig. 3 is a detail showing the arrangement of gears whereby rotation of the rolls at different speeds is effected.

Referring to the drawings, 10 is a suitable chamber, preferably well insulated to prevent escape of heat therefrom. Within the chamber 10 are located in superimposed relation a plurality of rolls 11. Said rolls. are preferably so spaced that they are in llght contact when hot. They are provided with hollow trunnions 12 which are provided with water cooled bearings 18 on the chamberlO. Said trunnions l2 are provided with suitable gears 14 interconnected by idling gears 15 so that the rolls rotate in the same direction;`l

Thus, at their points of contact the peripheries of the rolls move in opposite directions with a rubbing contact which effectively prevents accumulationv of solid material.

. Suitable means are provided whereby the rolls l1 are brought to a suitable temperature for the coking of the tar. For example, gas or liquid fuel may be admitted by nozzles 16 which are arranged to draw air for their combustion into the rolls 11. The combustion gases emerge by the opposite trunnions and may suitably pass into conduits 17 whereby the are conveyed to a suitable flue. If desire the combustion gases may be passed from one roll to the other, for example, by conduit 18. V

To facilitate the general downward travel of the residuum the surfaces of. the .various rolls l1 are roughened, forexample, by shallow longitudinal matically at 24.

At its upper end the chamber 10 is provided with suitable vapor outlets 19 for withdrawgrooving shown diagraming vapors resulting from the coking of the tars. Suitable distributing means 2O are provided for supplyingtar to the uppermost roll 11. At its bottom the chamber l0 is provided with an outlet 21 for the withdrawal of coke. Said outlet'maysuitably b`e controlled by a ,rotary valve 22. A brush or scraper 23 ispreferably provided adjacent the lowermost roll 11 for the purpose of removing powdered coketherefrom.

In operation, the rolls 11 are heated so as to bring the uppermost roll to a temperature of at least 800F., and the temperature of the succeeding rolls to progressively higher temperatures. The lowermost roll ymay be suitably maintained at a temperature of about 100() to'1200 F. The residue to be coked is received directly from the last still of a battery or may be preheated by any suitable means to a temperature of about 800 F. Such residue is flowed uniformly onto the top roll and the rolls are rotatedat a speed which is adapted to remove coke formed suliiciently` rapidly to permit the coking operation to roceed in a rapid and economical manner. or

example, with rolls of adiameter of two described in connection with the details of The vapors are removed continu-l a specific embodiment thereof, it must be speeds, means for heating said rolls to a temperature sufficient to coke tar, means for supplying a coating of tar to be coked-to at least one of said rolls, a vapor outlet from said chamber, and means forwithdrawing coke from said chamber.

2. An apparatus for cokin .tars comprising a cham er, a plurality o rolls mounted therein and adapted upon rotation tocrush therebetween any coke deposited upon their exterior curved surfaces, means for interiorly heating said rolls to a. temperature sufficient to coke tar, means for rotating said rolls in the' same direction, means for supplying to the exterior surfaces of the rolls a coating of tar to be coked, a vapor outlet from said chamber, and means for withdrawing coke from said chamber.

3. An apparatus for coliin tars comprising a chamber, a plurality o rolls mounted therein and adapted to crush solid matter therebetween, means for interiorly heating said rolls to coking temperature, means for rotating said rolls at differential speeds, a vapor outlet from said chamber and means for withdrawing coke from saidchamber.

4. An ap aratus for coking tars comprising a cham er, a plurality o rolls mounted therein and adapted to crush solid matter therebetween, means for interiorly heating said rolls to coking temperature, means for rotating said rolls in the same direction and at different speeds, a vapor outlet from said chamber and means for withdrawing coke from said chamber. a

' 5. The method of coking heavy viscous liquid petroleum residues which comprises applyin said residues to a series of adjacent rol s, interiorly heating said rolls to a temperature sufficient to coke the residue on said rolls causing the residue to coke upon the rolls, and rotating said rolls at different speeds to cause any coke deposited upon the rolls to be pressed therebetween and removed therefrom.

6. The method of coking heavy viscous liquid petroleum residues which comprises applyin said residues to a series of adjacent rol s, interiorly heating said rolls to a temperature sufficient to coke the residue on said rolls, causino' the residue to coke upon the rolls, and rotatlng said rolls in the same direction at different speeds to cause any coke deposited u on the rolls to be pressed therebetween an removed therefrom.

7 The method of continuously coking heavy viscous liquid petroleum residues which comprises applying the residues while at a temperature o at least 800 F. to the outer surfaces of a pair of rolls set closely together and adapted to crush solid matter passing therebetween, heating the rolls to a temperature between 800 and 1200 F., causing the residue on the rolls to coke, rotating the rolls so as to crush any coke formedv thereon, and removing the crushed coke from said rolls.

8. The method of continuously coking heavy viscous liquid petroleum residues together and adapted to crush solid matter passing therebetween, heating the rolls to a temperature sufficient to coke the tar thereon, causing the tar supplied to the rolls to coke, and rotating the rolls to cause the layers of colte thereon to be crushed and removed from the rolls.

10. The method of coking petroleum tar which comprises supplying the tar to the outer surfaces of a pair of rolls set closely together and adapted to crush solid matter passing therebetween, interiorly heating the rolls to a temperature suicient to coke the tar thereon, causing the tar supplied to the rolls to coke, and rotating the rolls in the same direction to cause the layers of coke thelreon to be crushed and removed from the rol s.

In testimony whereof I have hereunto set my hand and seal this 20th day of April,

GENTRY CASH. 

